Answer:
x=23.5
Step-by-step explanation:
90=25-x/2+18
combine like terms
90=43-x/2
subtract 43 from both sides
47= -×/2
47/2= 23.5
or
90-25= 65
65-18=47
47/2=23.5
4x+2y=18
-2(2x+3y=15)=-4x-6y=-30
-4x-6y=-30
-4y=-12
y=3
2x+3(3)=15
2x+9=15
2x=6
x=3
(3,3)
C
is a root.
is correct.
As
is a factor of
then it must be
Therefore,